As Marcus and Sam hunt for the traitor in their ranks who stole their nuclear launch key, Prosser disobeys orders and starts a small war he can't control. Meanwhile Grace and James must work together to defuse a dangerous situation, as back in D.C. Christine is indicted as Sam's co-conspirator.

Recap

The episode begins with Kendal searching on the island for Chaplin’s firing key. He is going through the stuff of all his men. Chaplin comes in and instructs Kendal to not inform anyone about the missing key. Kendal argues that if the goal of the person who stole the key was to “render us defenseless” the person would have done it by now. Chaplin in turn argues that the person who has stolen the key has probably “not reported their success yet” but once they do, there would be trouble. “We keep searching the crew” Chaplin orders Kendal. “We keep this up, we won’t have a crew” Kendal counters. ..